Barber Communication · Reference
Clipper Guard Reference — What Each Number Actually Leaves
Guard #2 doesn't mean "short." It means a precise hair length — and the brand varies. A practical reference for what each guard number leaves, and how guard progression builds a taper.
Reference
The standard guard table
US/global standard clipper guard sizes. Lengths are approximate — actual length varies ±0.5mm between manufacturers.
| Guard | Length (mm) | Length (in) | Visible reading |
|---|---|---|---|
| Skin / 0 | 0mm | 0" | No hair visible — bald. |
| #0.5 | ~1.5mm | ~1/16" | Hair-grade stubble — visible but minimal. |
| #1 | ~3mm | ~1/8" | Very short — buzz-cut territory. |
| #1.5 | ~4.5mm | ~3/16" | Short — used heavily in mid-taper blends. |
| #2 | ~6mm | ~1/4" | Standard short — most common base for tapers. |
| #3 | ~10mm | ~3/8" | Short-medium — common for the top of a buzz. |
| #4 | ~13mm | ~1/2" | Medium — sides on a longer overall cut. |
| #5 | ~16mm | ~5/8" | Medium-long — uncommon on tapers. |
| #6 | ~19mm | ~3/4" | Long — uncommon, generally top-of-buzz only. |
Technique
How guard progression builds a taper
A taper is not a single guard — it is a progression. The base guard establishes the consistent side length. Successive smaller guards close the gap toward the hairline, with each guard cutting only the lower portion of the previous guard's territory.
A clean blend never jumps two full guard sizes at once. Going from #3 directly to #1 leaves a visible step. The intermediate guard (#2) is required to close the gradient. This is why a typical taper brief lists three or four guards in sequence rather than a start and end point.
A standard mid-taper guard progression:
- 01
Base
#2 over the entire side — establishes the consistent above-the-taper length.
- 02
First step
#1.5 below the mid-parietal line — starts the gradient.
- 03
Second step
#1 mid-way down the gradient — closes toward the lower section.
- 04
Third step
#0.5 just above the hairline — final closing step before skin contact.
- 05
Edge
Skin (no guard) only at the immediate hairline — establishes the visible cut edge.
Variance
Brand variance — why "#2" isn't universal
The standard guard numbers are widely used, but manufacturers calibrate slightly differently. Wahl, Andis, and Babyliss each ship with attachments that leave roughly the same length — but with up to 0.5mm variance per size. A #2 on a Wahl Magic Clip is closer to 6.5mm; the same number on an Andis Master is closer to 6mm.
For most clients this difference is invisible. For clients sensitive to precise length (very short cuts, skin-finished tapers, thinning hair), the variance matters. Ask your barber which clipper they use and which guard size they would specify — the answer translates between barbershops more reliably than just a guard number.
Frequently asked
Quick answers to the obvious follow-ups.
A zero or skin guard usually means no guard attachment — the clipper blade in direct contact with the skin. Some clippers ship with a #0.5 attachment that leaves about 1.5mm; this is sometimes called "zero" informally but is technically not bald.